题目

听第10段材料，回答三小题。 （1） What did the scientists do to the road？ A . They repaired it. B . They painted it. C . They blocked it （2） Why are young birds drawn to the road surface？ A . It's warm. B . It's brown. C . It's smooth. （3） What is the purpose of the scientists' experiment？ A . To keep the birds there for a whole year. B . To help students study the birds well. C . To prevent the birds from being killed.8．下列关于“酒精温度计遇冷读数下降”的微观解释正确的是（　　）A．分子停止运动B．分子体积缩小C．分子间间隔减小D．分子种类发生变化